Calculus of Love -- Why Good Marriages Are Made of Math

Psychologists John and Julie Gottman are famous for being able to predict with 94% accuracy whether a couple will break up, stay together unhappily, or stay together happily. In their Love Lab, they've identified hidden patterns of behavior that can strengthen or weaken relationships. If we'd known the secret to a good marriage was non-linear differential equations, we might have paid more attention in math class.